Sink



FIG. 1 is a side, top perspective view of the sink with plumbing holes thereof shown in phantom for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof. 

The ornamental design for a sink, as shown and described. 